“What is the best antidepressant for stress?”

Hello,  Sorry to hear that you have stress.  There is no anti-stress medicine.  The antidepressant has to be prescribed by a Psychiatrist or your PCP upon evaluation.  So you would need to contact one to go through the process.  As I am a licensed psychologist I am not allowed to give you advice on medication. I would suggest go for stress management therapy.  I am licensed in FL, IN, and IL.  So in case you are in any of those states call me. Otherwise find someone in your state ASAP. Take care and remain safe. 

see this link...
https://www.everydayhealth.com/anxiety/guide/medications/
or
https://www.consumerreports.org/cro/2013/01/depression-and-anxiety/index.htm
or
https://blogs.scientificamerican.com/scicurious-brain/stress-and-antidepressants-by-their-powers-combined/